Display device for temperature correction of an input image signal on a touch display panel

Abstract

A display device includes: a temperature distribution obtaining circuit obtaining temperature distribution on a display panel on a basis of a capacitance value signal to be output from a capacitive touch panel overlapping the display panel; and a correcting circuit correcting an input image signal on a basis of the temperature distribution on the display panel, and supplying the input image signal.

What is claimed is: 
     
       1. A display device, comprising:
 a display panel configured to display an image; 
 a capacitive touch panel overlapping a surface of the display panel; 
 a temperature distribution obtaining circuit configured to obtain a temperature distribution on the surface of the display panel on a basis of a capacitance value signal to be output from the capacitive touch panel; and 
 a correcting circuit configured to correct an input image signal corresponding to the image, and supply the input image signal to the display panel, the input image signal being corrected on a basis of the temperature distribution on the surface of the display panel obtained by the temperature distribution obtaining circuit, wherein 
 the temperature distribution obtaining circuit obtains the temperature distribution on a basis of a high-frequency component of the capacitance value signal. 
 
     
     
       2. The display device according to  claim 1 , wherein
 the display panel includes a plurality of light-emitting display elements, and 
 on a basis of the temperature distribution, the correcting circuit adjusts an amount of a current driving the light-emitting display elements. 
 
     
     
       3. The display device according to  claim 1 , wherein
 the display panel includes a plurality of light-emitting display elements, 
 each of the light-emitting display elements includes:
 a light-emitter configured to display the image; 
 a drive transistor configured to drive the light-emitter; and 
 a monitor circuit configured to monitor at least one of the light-emitter or the drive transistor, and 
 
 the correcting circuit corrects monitor information on the at least one of the light-emitter or the drive transistor which is monitored by the monitor circuit, and adjusts an amount of a current driving the light-emitting display elements, the monitor information being corrected on a basis of the temperature distribution obtained by the temperature distribution obtaining circuit, and the amount of the current being adjusted on a basis of the corrected monitor information. 
 
     
     
       4. The display device according to  claim 1 , wherein
 the display panel includes a plurality of liquid-crystal display elements, and 
 the correcting circuit further adjusts an overdrive for increasing a response speed of the liquid-crystal display elements, the overdrive being adjusted on a basis of the temperature distribution on the surface of the display panel obtained by the temperature distribution obtaining circuit. 
 
     
     
       5. The display device according to  claim 1 , wherein
 the temperature distribution obtaining circuit includes:
 a high-pass filter configured to allow a high-frequency component of the capacitance value signal to pass through; 
 an amplitude amount calculating circuit configured to calculate an amount of amplitude of the high-frequency component passing through the high-pass filter; and 
 a temperature converting circuit configured to convert, to a temperature, the amount of the amplitude of the high-frequency component calculated by the amplitude amount calculating circuit. 
 
 
     
     
       6. A display device, comprising:
 a display panel configured to display an image; 
 a capacitive touch panel overlapping a surface of the display panel; 
 a temperature distribution obtaining circuit configured to obtain a temperature distribution on the surface of the display panel on a basis of a capacitance value signal to be output from the capacitive touch panel; and 
 a correcting circuit configured to correct an input image signal corresponding to the image, and supply the input image signal to the display panel, the input image signal being corrected on a basis of the temperature distribution on the surface of the display panel obtained by the temperature distribution obtaining circuit, wherein 
 the display panel includes a plurality of liquid-crystal display elements, and 
 the correcting circuit adjusts an overdrive for increasing a response speed of the liquid-crystal display elements, the overdrive being adjusted on a basis of the temperature distribution on the surface of the display panel obtained by the temperature distribution obtaining circuit. 
 
     
     
       7. A display device, comprising:
 a display panel configured to display an image; 
 a capacitive touch panel overlapping a surface of the display panel; 
 a temperature distribution obtaining circuit configured to obtain a temperature distribution on the surface of the display panel on a basis of a capacitance value signal to be output from the capacitive touch panel; and 
 a correcting circuit configured to correct an input image signal corresponding to the image, and supply the input image signal to the display panel, the input image signal being corrected on a basis of the temperature distribution on the surface of the display panel obtained by the temperature distribution obtaining circuit, wherein 
 the temperature distribution obtaining circuit includes:
 a high-pass filter configured to allow a high-frequency component of the capacitance value signal to pass through; 
 an amplitude amount calculating circuit configured to calculate an amount of amplitude of the high-frequency component passing through the high-pass filter; and 
 a temperature converting circuit configured to convert, to a temperature, the amount of the amplitude of the high-frequency component calculated by the amplitude amount calculating circuit.